[Tc 99M DMSA scintigraphy in children with a first episode of acute pyelonephritis: correlation with laboratory tests, echography and the presence of vesico-ureteral reflux].

Background: Tc99m DMSA (dimercaptosuccinic acid) scintigraphy has a high sensitivity for the detection of cortical kidney damage.

Aim: To evaluate the Tc99m DMSA renal scintigraphy in children with a first episode of acute pyelonephritis and its association with laboratory parameters, kidney ultrasound and vesicoureteral reflux.

Patients And Methods: We studied 143 children (age range 8 days, 12 years, 66% female) hospitalized with the clinical diagnosis of acute pyelonephritis (first episode) with a positive urine culture and a renal scintigraphy performed within seven days of diagnosis.

[Tc99m-pertechnetate thyroid scintigraphy in newborns with congenital hypothyroidism].

Background: Congenital hypothyroidism is one of the most frequent endocrine diseases of the newborn and requires an early diagnosis to avoid its deleterious effects on neurological and intellectual functions.

Aim: To evaluate thyroid scintigraphy (TS) findings in newborns with congenital hypothyroidism (CH), detected in the national program of newborn screening, which is working in Chile since 1992.

Material And Methods: TS findings of 189 newborns with CH (68% female) were analyzed.